fix: replace all native confirm() dialogs with styled modal macros

Migrated ~68 native browser confirm() calls across 74 files to use the
project's confirm_modal/confirm_modal_dynamic Jinja2 macros, providing
consistent styled confirmation dialogs instead of plain browser popups.

Modules updated: core, tenancy, cms, marketplace, messaging, billing,
customers, orders, cart. Uses danger/warning/info variants and
double-confirm pattern for destructive delete operations.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/tenancy/static/admin/js/admin-user-detail.js

@@ -17,6 +17,9 @@ function adminUserDetailPage() {
         error: null,
         userId: null,
         currentUserId: null,
+        showToggleStatusModal: false,
+        showDeleteModal: false,
+        showDeleteFinalModal: false,
 
         // Initialize
         async init() {
@@ -116,11 +119,6 @@ function adminUserDetailPage() {
                 return;
             }
 
-            if (!confirm(`Are you sure you want to ${action} "${this.adminUser.username}"?`)) {
-                adminUserDetailLog.info('Status toggle cancelled by user');
-                return;
-            }
-
             this.saving = true;
             try {
                 const url = `/admin/admin-users/${this.userId}/status`;
@@ -142,6 +140,12 @@ function adminUserDetailPage() {
             }
         },
 
+        // Intermediate step for double-confirm delete
+        confirmDeleteStep() {
+            adminUserDetailLog.info('First delete confirmation accepted, showing final confirmation');
+            this.showDeleteFinalModal = true;
+        },
+
         // Delete admin user
         async deleteAdminUser() {
             adminUserDetailLog.info('Delete admin user requested:', this.userId);
@@ -152,17 +156,6 @@ function adminUserDetailPage() {
                 return;
             }
 
-            if (!confirm(`Are you sure you want to delete admin user "${this.adminUser.username}"?\n\nThis action cannot be undone.`)) {
-                adminUserDetailLog.info('Delete cancelled by user');
-                return;
-            }
-
-            // Second confirmation for safety
-            if (!confirm(`FINAL CONFIRMATION\n\nAre you absolutely sure you want to delete "${this.adminUser.username}"?`)) {
-                adminUserDetailLog.info('Delete cancelled by user (second confirmation)');
-                return;
-            }
-
             this.saving = true;
             try {
                 const url = `/admin/admin-users/${this.userId}`;